Service difficulty report · Sidewall Support · Boeing 7378H4

Difficulty date
September 15, 2023
Submitted
October 26, 2023
Operation
Air carrier
Aircraft
N8308K
Make and model
Boeing 7378H4
Aircraft serial
36682
Aircraft time
37,857 hours, 17,208 cycles
Part
Sidewall Support
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CORROSION ON FLOOR TO SIDEWALL SUPPORT BS500B+11 - BS500E; BS500G - BS500H RBL23 WL156.<[01] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS OF FCB FLOOR TO SIDEWALL SUPPORT BS 500B+11-BS 500E;BS 500G-500H RBL 23 WL 156 IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2.;[02] UPDATE STEP#1-4;[03] REMOVED FCB FLOOR TO SIDEWALL SUPPORT BS500A - BS500I RBL23 WL156 IAW SRM 51-40-02;[04] FABRIACATED LOCATED AND DRILLED FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT RBL 23 WL 156 MATERIAL USED BAC 1496-444#7075T62 LOT#509343-1 AND SPLICE BETWEEN BS 500'E' TO 500 'F'RBL 23 WL 156 MATERIAL USED BAC1496-444#7075T62 LOT#509343-1 IAW SRM 51-40-05 SRM 53-00-53-2R-6 REPAIR 6 AND DWG 143A7501 REV:- APPLIED CHEMICAL CONVERSION COATING IAW SRM 51-20-01;OK PRIMER;[05] UPDATE STEP 5-6;[06] UPDATE STEP#7-8;[07] UPDATE STEP 5.;[08] CORRECTION TO STEP 5.;[09] UPDATE STEP 5.;[10] COMPLETED STEP 5.;[11] TASK COMPLETE:<BR>REMOVED FLOOR TO SIDEWALL IAW SRM 51-40-02. FABRICATED; LOCATED; AND DRILLED NEW FLOOR TO SIDEWALL IAW SRM 51-40-05; SRM 53-00-53-2R-6 REPAIR 6; AND DWG 143A7501. APPLIED SURFACE TREATMENT IAW SRM 51-20-01 AND AMM 51-21-72-370-804. INSTALLED NEW FLOOR TO SIDEWALL SUPPORT IAW DWG 143A7505; DWG 143A7500; AND SRM 51-40-02-0G-0.;[12] VERIFIED RII STEPS COMPLETE;[13] VERIFIED JOB COMPLETE<BR><BR>VERIFIED MEASUREMENT TABLE

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